Coal-bunker system



April 21, 1925.

E. C. SHARPE COAL BUNKER SYSTEM Filed June 25, 1.92s a sheets-sheet 1 INVENTOR.

.5 C walyoe April 21', 1925'. 1534;667 E. c. SHARPE 1 GOAL BUNKER SYSTEM Filed June 25, 1923 3 Sheets-Sheet 2 l (9% l i i i]; I M 131-1! I a Fi Q i i i: .1

N v \i INVENTOR. fC Jhalyoe.

ATTORNEY.

Patented Apr. 21, 1925.

UNITED STATES PATENT OFFICE.

EDWIN CLINTON SHARPE, OF PIEDMONT, CALIFORNIA.

COAL-BUNKER SYSTEM.

Application filed June 25, 1923. Serial a... 647,532.

mimimum movement of the coal along the bunker system. It .will be understood by those skilled in the art that in handling coal in a retail yard, that the coal is either sacked .for shipment or delivery, or is run into a truck for delivery, and it must be of a given grade as to size to be acceptable to the customer. I

()rdinarily the bulk of the coal purchased will be of the desired size so this bunker is arranged to receive and detain the largest portion thereof where dumped, the oversize being delivered to breakers and the undersize, which is the smallest part, is then delivered to other separators and bins of 3d the system where in turn the finest material only is carried along to'be again separated.

This process may be repeated as often as necessary to give the desired number of sizes until at the end a rotary screen may be used to separate and deliver the finest materials into three sizes, to-wit: the dust, pea and small nut, which are then about equal in percentages.

Other objects of the invention will appear as the description proceeds.

An embodimentof the invention is shown in the accompanying drawings in which the same reference numeral is applied to the same portion throughout, but I am aware that there may be modifications thereof.

Fig. 1 is a side elevation of the complete bunker system, only two of the platforms being shown.

Fig. 2 is a vertical sectional view of the first bunker, the plane of section being at right angles to Fig, 1,

Fig. 3 is a side elevation of the first bunker looking in the opposite direction from Fig. 1, showing the location of the breaker,

Fig. 4 1s a plan view of the bunkers, the

relative sizes being indicated roughly by the areas thereof,

Fig. 5 is asectionalview of the second bunker, and

Fig. 6 is a sectional bunker.

' The bunker is built. inthe usual manner of large coal bins, having heavy supporting iew of the third posts 1, which are connected by the joists 2 and stringer 3.

There is an incline 4 up which the cars 5 may be delivered to the platform 6.

In front of some or all the chutes 7 there may be a sacking platform8 at a convenient elevation to allow the workmen to fill the sacks directly-from the chutes 7.

lVithin the bunker there is a battle board 9 to prevent the coal from passing directly into the chutes 10 to 12 inclusive, at the bottom of the 6-inch grizzly bars 13 on which the coal is dumped. The coal passing through thethe 6-inch grizzly bars falls on a screen 1 1 having (5-inch square or round openings so the material passing through it will be the smaller materialspassing the 6- inch grizzly.

The material retained on the screen 14 is ready to be delivered either to sacks or wagons from the chutes 7, suitable gates 7 being provided in said chutes to prevent the coal from running out on-the platform, except when it is desired to allow it to escape.

Extending under the full length of the 6-inch bunker is a conveyor 15 which-receives the coal passing through the screen 14, hopper floors 16 and 17directing it onto the said conveyor. The conveyor 15 dis- .char es its materials in a hopper 18 from whic the endless elevator 28 takes itto .the top of the next bunker of the system.

At the bottom of the chutes lOto 12 there is a suitable large breaker, indicated herein, by the two breaker rolls 19 and 20 through which the large lumps are passed to reduce a slide 31 causing the coal to be dumped near the center of the bin, said bunker being constructed similar to the first bunker, but with the omission of the car platform. The screen 29 is provided with 2 inch holes, and whatever material passes through it falls on the incline 32, and is delivered to the conveyor 33.

The material elevated by the conveyor 33 is dropped on a slide 34 which delivers it to the center of the bunker 35 in which thereis a screen 36 having one and one-half inch holes. The material passing this screen 36 falls on the floor 37 and is then delivered to the elevator 38 by which it is dumped into the chute 39 from which the coal passes into the rotary screen.

The screen .40 is arranged to deliver ma terials which do not pass through it into the bin 41. Outside the screen 40 there .is a reversely placed frusto-conical screen 4:2 arranged to deliver materials which do not pass through it to the bin 43, the dust being dropped into the bin 44. Chutes to 51 enable the coal to be drawn from the bins as may be required and they are at an elevation such as will enable trucks to be filled direct or the platforms 8 may be moved under said chutes to enable the workmen to fill sacks top of the bunker 35. This will pass all sizes under 1- inches and then the finest materials will'be delivered to the rotary screens for the final separation.

While the percentages of fine to coarse material will vary. with different coals the screens used can be varied in size as may be required to handle any given coal with the minimum amount of transference, thereby greatly economizing on the power used as Well as economizing in coal breakage since the less the coal is. handled the less coal there is broken. H

What I claim is as follows, but modifications may bemade in carrying out the in-.

vention shown in the drawings and in the above particularly described from thereof, Within the urview of the invention.

1. A coa bunker system, comprising a bin, a bin having screens to separate the material into threesizes, a breaker to which the coarsest material is passed, said bin retaining the intermediate material, chutes for loading wagons or filling sacks from the intermediate size material retained in said bin, a conveyor to take the broken material from the breaker back to the bin and another conveyor to take the finest material to a place of storage.

2. A coal bunker system, comprising a bin having screens to separate the coal into three sizes, said bin retaining the intermediate size materials, chutes extending from said-bin to load the intermediate sized materials, a breaker to which the coarsest material is, sent, an elevator to return the broken material to the bin, a conveyor to take the finest material to another bin adapted to separate the material into two sizes the finest material passing to a place of storage away from that bin.

3. A coal bunker system, comprising a bin having screens to separate the material passed thereto into three sizes the intermediate size remaining in the bin,-a breaker to which the'coarsestmaterial passes, a conveyor to return the broken material to the bin, another conveyor to carry the finer material to another bin the latter bin having a screen to separate the material into two sizes the finest material passing to a conveyor from which it is elevated to a place of. storage.

4. A coal bunker system, comprising a bin, screens therein '"to separate the material into three sizes the intermediate size remaining in the bin, a coal'breaker to which the largest size is passed, an elevator to return the broken coal to the bin, a conveyor In testimony whereof I have hereunto set my hand this 15th day of J une A. D. 1923.

EDWIN CLINTON SHARPE. 

